The only way I set em now is when the ex. just starts to open I set the in. when the in. is fully open I set the ex. and have checked it w/the manifold off and I'm on the base circle. Any other lazy method as stated was off by a good amount any my solid roller w/alum. heads and iron block ends up at .020 hot when I set em at .014 cold and no way I'd play the hot setting method except once to verify the settings then cold from now on............Too much unnecessary dirty work...........